3.16 (guest hangs with two rng devices) 3.16 + quick fix (can startup with two rng devices) (hotplug issue 1 + hotplug issue 2 exist) lates torvalds/linux.git + amit 4 patches (can startup with two rng devices) (only hotplug issue 2 exists) However, the 4 patches also fixed the hang issue, the hotplug issue was fixed a little. The hotplug issue is effected by the backend, or maybe it's not a real issue, because the rng device can be hot-removed after dd process is killed. Hotplug issue 1: 1. boot up guest with two rng device (rng0 uses /dev/urandom, rng1 uses /dev/random) 2. read data by dd in guest 3 (option 1). hot-remove rng0, then hot-remove rng1 -> result: _only rng1_ can't be removed until dd process is killed 3 (option 2). hot-remove rng1, then hot-remove rng0 -> result: two devices can be removed successfully, dd process will exit automatically. If we use /dev/urandom for rng0 and rng1, _rng0 & rng1_ can be removed, dd process will exit automatically. Hotplug issue 2: If we use /dev/random for rng0 and rng1, _rng0 & rng1_ can't be removed until dd process is killed. Hotplug issue 3: If we use /dev/random for rng0 and rng1, _only rng1_ can't be removed until dd process is killed. (The difference between /dev/random and /dev/urandom is the speed.) Thanks, Amos _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
